1N/A/***********************************************************************
1N/A* *
1N/A* This software is part of the ast package *
1N/A* Copyright (c) 1985-2011 AT&T Intellectual Property *
1N/A* and is licensed under the *
1N/A* Common Public License, Version 1.0 *
1N/A* by AT&T Intellectual Property *
1N/A* *
1N/A* A copy of the License is available at *
1N/A* http://www.opensource.org/licenses/cpl1.0.txt *
1N/A* (with md5 checksum 059e8cd6165cb4c31e351f2b69388fd9) *
1N/A* *
1N/A* Information and Software Systems Research *
1N/A* AT&T Research *
1N/A* Florham Park NJ *
1N/A* *
1N/A* Glenn Fowler <gsf@research.att.com> *
1N/A* David Korn <dgk@research.att.com> *
1N/A* Phong Vo <kpv@research.att.com> *
1N/A* *
1N/A***********************************************************************/
1N/A#pragma prototyped
1N/A
1N/A#include <ast.h>
1N/A
1N/A#if _lib_readlink
1N/A
1N/ANoN(readlink)
1N/A
1N/A#else
1N/A
1N/A#include "fakelink.h"
1N/A
1N/A#include <error.h>
1N/A
1N/A#ifndef ENOSYS
1N/A#define ENOSYS EINVAL
1N/A#endif
1N/A
1N/Aint
1N/Areadlink(const char* path, char* buf, int siz)
1N/A{
1N/A int fd;
1N/A int n;
1N/A
1N/A if (siz > sizeof(FAKELINK_MAGIC))
1N/A {
1N/A if ((fd = open(path, O_RDONLY)) < 0)
1N/A return -1;
1N/A if (read(fd, buf, sizeof(FAKELINK_MAGIC)) == sizeof(FAKELINK_MAGIC) && !strcmp(buf, FAKELINK_MAGIC) && (n = read(fd, buf, siz)) > 0 && !buf[n - 1])
1N/A {
1N/A close(fd);
1N/A return n;
1N/A }
1N/A close(fd);
1N/A }
1N/A errno = ENOSYS;
1N/A return -1;
1N/A}
1N/A
1N/A#endif